'Nightline' Daily Line, May 17: Singer Donna Summer Dead at 63

10:01 p.e. ET: The photos creating even more controversy in the shooting of 17-year-old Trayvon Martin by self-appointed neighborhood watchman George Zimmerman… tonight on Nightline, ABC's Matt Gutman tells us what this new evidence tells us- and what further questions it may raise.

(Florida State District Attorney's Office)

7:56 p.m. ET: Baby-talkers, beware:

"Melodee Megia, a former employee at The Cosmopolitan Resort and Casino in Las Vegas, claims she was told she was fired from her job for saying "bye bye" on the telephone instead of "goodbye" while eight-months pregnant."

4:31 p.m. ET: A Humboldt penguin that made a daring escape from a Tokyo aquarium has resurfaced two months later - in Tokyo Bay. He seems to be cackling all the way to freedom.

Credit: Japan Coast Guard''s 3rd Regional Headquarters/AP Photo

3:03 p.m. ET: JOHN EDWARDS TRIAL: John Edwards was a bad husband who cheated on his wife while she died of cancer, but he never broke the law, his lawyer said in closing arguments today.

The prosecution said Edwards was more than a bad husband. The former presidential candidate was the chief architect of a criminal scheme to illegally use campaign contributions to cover up the love affair.

Now it's up to the jury to decide. If convicted, Edwards could be sentenced to as much as 30 years in prison. Read more HERE.

2:25 p.m. ET: More details are emerging about the death of Mary Richardson Kennedy. New York's Westchester County Medical Examiner's office reported that Kennedy died of asphyxiation by hanging. Read about the report HERE.

In a 2008 interview with "Nightline," Summer talked about where she got the inspiration for her hit song, "She Works Hard for the Money." Watch it here:

10:17 a.m. ET: UPDATE: In the wake of an ABC News investigation revealing extreme animal cruelty, Pepsi has canceled its sponsorship of the annual Tennessee Walking Horse championship, the Celebration. Read the full story HERE.

The discontinuation of the relationship was "effective immediately," according to Pepsi spokesman Dave DeCecco. The company said its logo was removed Wednesday from the Celebration website, prior to the broadcast of the ABC News report on "Nightline." Watch the report here:

9:25 a.m. ET: ABC's Juju Chang hung out with Lady Antebellum yesterday as the Grammy award-winning country music group treated Henryville, Ind., students to a "prom" performance, followed by a benefit concert for the devastated community.

Credit: Rick Diamond/Getty Images

On March 2, a deadly string of twisters wiped out Henryville's elementary, middle and high schools. Thirteen people were killed in southern Indiana and the community is still rebuilding.

"We wanted to try to bring a smile on people's face," said Lady Antebellum's Dave Haywood. "We want tonight, at the concert, for people to just smile, have fun, dance around. We thought that was something we could offer to do to help as well as raise as much funds as we could raise."